EP2818361A1 - Vehicle seat and commercial motor vehicle with at least one vehicle seat - Google Patents

Abstract

The invention relates to a vehicle seat (1, 2) having a seat part (4), a backrest (5) and a height-adjustable armrest (8), in which the height-adjustable armrest (8) has an armrest part (9) and a lever mechanism (10 ) for raising or lowering the Armauflageteils (9) with a stationary base member (14), with one or two hinged to the base member (14) pivot lever parts (17, 18) and with a hinged to the or on the pivot lever parts (17, 18) height-adjustable lower part (16) for supporting the Armauflageteils (9), wherein the height-adjustable armrest by a locking device (30) for locking the lever mechanism (10) arranged with a base member side and a first locking teeth (35) having first locking member (32), with a lower component side arranged and a further locking toothing (36) having second locking member (33), and with locking means (38) is characterized, compared to the two locking parts n (32, 33) are arranged so displaceable by means of an actuating element (46) that Gegensperrverzahnungen (44, 45) of the locking means (38) in the locking teeth (35, 36) of the locking parts (32, 33) are engageable or disengaged to to lock or unlock the lever mechanism (10).

Description

The invention relates to a vehicle seat with a seat part, with a backrest and with a height-adjustable armrest, wherein the height-adjustable armrest an Armauflageteil and a lever mechanism for raising or lowering the Armauflageteils with a stationary base member, with one or two hinged to the base member pivot lever parts and a hinged on the or on the pivot lever parts height-adjustable sub-component for supporting the Armauflageteils.

The invention further relates to a utility vehicle, in particular an agricultural utility vehicle, with at least one vehicle seat.

Generic vehicle seats with such height-adjustable armrests are already known from the prior art. For example, the patent teaches DE 10 2005 006 977 B4 a height-adjustable armrest for a vehicle seat with a correspondingly formed swivel arm, by means of which an armrest of the armrest is height-adjustable arranged on the vehicle seat. The armrest is characterized by a relative to a longitudinal axis of the pivoting arm upwardly inclined gas spring to realize an optimized interaction between the gas spring and the pivot arm in a stable, space-saving and simple overall design.

The object of the invention is to further develop generic equipped with a height-adjustable armrest vehicle seats and in particular a faster height adjustment To allow the armrest with a structurally very low cost. The object of the invention is achieved by a vehicle seat with a seat part, with a backrest and with a height-adjustable armrest, wherein the height-adjustable armrest an Armauflageteil and a lever mechanism for raising or lowering the Armauflageteils with a stationary base member, with one or two on the base member articulated pivot lever parts and having a hinged on or on the pivot lever parts height-adjustable sub-component for supporting the Armauflageteils, wherein the height-adjustable armrest by a locking device for locking the lever mechanism arranged with a base member side and a first locking teeth having first locking member, arranged with a lower component side and a further locking teeth having second locking member, and characterized by locking means which are arranged so displaceable relative to the two locking parts by means of an actuating element that Gegenverza ments of the locking means in the locking teeth of the locking parts can be engaged or disengaged to lock or unlock the lever mechanism.

By thus acting locking device, a height adjustment of the height-adjustable armrest can be made structurally particularly simple.

The height-adjustable armrest is configured with respect to the lever mechanism such that the Armauflageteil is height adjustable relative to a frame of the vehicle seat. In this respect, in particular the Armauflageteil is raised or lowered relative to the stationary base member of the lever mechanism.

Preferably, the lever mechanism comprises two pivot lever parts, by means of which the height-adjustable lower part of the Armauflageteils articulated to the stationary base member, the second pivot lever part substantially for stabilizing the height-adjustable sub-component, so that the Armauflageteil remains largely horizontally independent of the set height.

With a corresponding embodiment, such a lever mechanism can also be realized with only one pivot lever part. However, for reasons of stability and a simple mechanical design, ideally two such pivoting lever parts are integrated in the lever mechanism such that the articulation points between the two pivoting lever parts and the base component on the one side and the height-adjustable lower component on the other side form a parallelogram. Here are the base member, the two Pivoting lever parts and the height-adjustable subcomponent, the legs of the parallelogram linked together by the articulation points.

It is understood that the mutually pivotable and non-pivoting components of the lever mechanism can be configured almost arbitrarily in order to provide a compact height-adjustable armrest to the vehicle seat can. It is expedient, however, if the components are each bent from a sheet metal construction and connected to each other in such a way by the pivot points that they can be at least partially pushed into each other when the height-adjustable armrest is adjusted in height.

It is further understood that the components of the locking device can be configured differently and arranged differently from each other, to be able to act according to the lever mechanism correspondingly easy blocking and unlocking.

In order to make the locking device structurally particularly simple, it is advantageous if the actuating element rotatable with an axis of rotation cam member and the locking means radially to this axis of rotation outwardly displaceable the Gegensperrverzahnungen comprising locking slide parts, wherein the radially displaceable locking slide parts and cam portions of the rotatable cam member such arranged to each other, that upon rotation of the actuating element in a first rotational direction, the counter-locking teeth of the radially displaceable locking slide parts are engageable by the rotatable cam member with the locking teeth.

By such a structure selected, the blocking means can be mounted structurally simply displaceable radially outward. In this respect, a reliable blocking of the locking device and also the lever mechanism of the height-adjustable armrest can be achieved.

In order to unlock the locking device and thus also the lever mechanism of the height-adjustable armrest just as easily, it is advantageous if the cam part comprises release elements, which are in operative connection with the radially displaceable locking slide parts such that upon rotation of the actuating element in one of the first direction of rotation opposite second direction of rotation, the Gegensperrverzahnungen the radially displaceable locking slide parts can be disengaged by the rotatable cam member from the locking teeth.

Furthermore, it is advantageous if the disengaging elements have contact surfaces, which interact with a rotation of the actuating element in the second direction of rotation with bevels of the radially displaceable locking slide parts.

Through this interaction of the contact surfaces and the ramps, the radially displaceable Sperrschiebeteile structurally simple and radially inward, ie on the axis of rotation of the cam member, to be moved, whereby the corresponding Gegensperrverzahnungen can be disengaged from the locking teeth. Here, the lever mechanism can then be moved freely and in particular the Armauflageteil be adjusted in height.

The locking device can be made very compact, when the release elements are arranged radially further outward than the cam portions and circumferentially of the rotatable cam member offset from the cam portions.

Thus, the locking device in the normal state can lock the lever mechanism reliable, it is advantageous if the outwardly displaceable locking slide parts are arranged spring-biased so that the counter-locking teeth are always kept in engagement with the locking teeth. At least as long as the cam part is not manually rotated in the second direction of rotation. A very favorable spring preload can also be achieved by a correspondingly spring-biased axis of rotation or the cam part.

The lever mechanism can easily absorb armrest forces acting on the armrest part when the locking device is arranged interactively between the height-adjustable lower component and one of the pivot lever parts or between the base part and one of the pivot lever parts.

If the locking device acts between the height-adjustable lower component and one of the swivel lever parts, the actuating element can be reached particularly well by a person sitting on the vehicle seat since it can change its height position with the height-adjustable lower component.

Here, the base component side arranged first locking member may be attached directly to the base member. Structurally even cheaper, the corresponding first ratchet teeth can be configured directly by the base component.

Likewise, the second locking part arranged on the lower side can be fastened directly to the height-adjustable lower component. Constructively much easier, the corresponding further locking teeth can be configured directly by the height-adjustable sub-component.

If the blocking device acts between the base component and one of the swiveling lever parts, the actuating element can also be arranged in a structurally simple manner as an alternative to the height-adjustable armrest in a stationary manner.

In particular, a vertically upward height adjustment of the Armauflageteils can be easily biased when the height-adjustable armrest comprises a drive means with a drive element for power assisted height adjustment of the Armauflageteils.

Although the lever ratios of the lever mechanism can be chosen such that a movement of the height-adjustable Armauflageteils is easily possible. However, a more comfortable height adjustment succeeds by means of a drive device which comprises, for example, a gas spring element as the drive element.

A structurally very simple solution suggests that the drive element comprises a tension spring element. The tension spring element is in this case integrated in the height-adjustable armrest, that the height-adjustable Armauflageteil can be adjusted almost neutral and up and down.

A more comfortable but also costly designed embodiment provides that the drive element comprises an electrically driven drive motor.

In order to make a further improved adaptation of the height-adjustable armrest, it is advantageous if the height-adjustable lower component comprises a lower part and a relative to the lower part displaceable upper part. This allows the Armauflageteil be placed transversely to the height adjustment and in the headquarters direction further forward or further back, so that a more versatile armrest can be achieved.

The object of the invention is also still solved by a commercial vehicle, in particular by an agricultural utility vehicle, with at least one vehicle seat, wherein the utility vehicle or the agricultural utility vehicle characterized by a vehicle seat according to one of the features disclosed here.

If the commercial vehicle, in particular the agricultural utility vehicle, comprises the vehicle seat according to the invention, it can advantageously be achieved that the height adjustment on the armrest can be made much easier for a person sitting on the vehicle seat. Thus, the operation of the height-adjustable armrest also requires much less attention from this person, so that a height adjustment of the Armauflageteils especially a driver of the utility vehicle less strongly distracts from its actual task, namely driving the vehicle. This considerably reduces the risk of accidents.

Figur 1

schematisch eine erste Seitenansicht eines Fahrzeugsitzes mit einer höhenverstellbaren Armlehne, dessen Hebelmechanismus mittels einer durch ein Betätigungselement betätigbaren Sperreinrichtung gesperrt oder entsperrt werden kann;

Figur 2

schematisch eine weitere Seitenansicht des Fahrzeugsitzes mit einer vertikal weiter nach oben verstellten Armlehne;

Figur 3

schematisch eine Rückansicht des Fahrzeugsitzes;

Figur 4

schematisch eine Modelansicht einer händisch betätigbaren Sperreinrichtung mit einem entsprechenden Bediengriff;

Figur 5

schematisch eine weitere Modelansicht der händisch betätigbaren Sperreinrichtung aus der Figur 4 im Zusammenspiel mit einer ein Zugfederelement umfassenden Antriebseinrichtung;

Figur 6

schematisch eine Modelansicht einer motorunterstützten Sperreinrichtung;

Figur 7

schematisch eine Teilansicht einer ersten möglichen Mechanik der Sperreinrichtung; und

Figur 8

schematisch eine Ansicht eines radial verschieblichen Sperrmittels der in der Figur 5 gezeigten Mechanik.

Further advantages, objects and features of the present invention will be explained with reference to the appended drawings and the following description in which an example of a vehicle seat equipped with a locking device according to the invention is shown and described. In the drawing show:

FIG. 1

schematically a first side view of a vehicle seat with a height-adjustable armrest whose lever mechanism can be locked or unlocked by means of an operable by an actuator locking device;

FIG. 2

schematically another side view of the vehicle seat with a vertically further upwardly adjusted armrest;

FIG. 3

schematically a rear view of the vehicle seat;

FIG. 4

schematically a model view of a manually operable locking device with a corresponding operating handle;

FIG. 5

schematically another model view of the manually operable locking device from the FIG. 4 in interaction with a tension spring element comprising a drive device;

FIG. 6

schematically a model view of a motor-assisted locking device;

FIG. 7

schematically a partial view of a first possible mechanism of the locking device; and

FIG. 8

schematically a view of a radially displaceable locking means in the FIG. 5 shown mechanics.

In the in the FIGS. 1 to 3 In particular, the vehicle seat 1 shown is a utility vehicle seat 2 of an agricultural utility vehicle 3 not shown further here.

The vehicle seat 1 has a seat part 4, a backrest 5 and, seen on the right side 6 in the main driving direction 7, a height-adjustable armrest 8 with an armrest part 9.

The height-adjustable armrest 8 has a lever mechanism 10, by means of which the Armauflageteil 9 in the vertical direction 11 is height adjustable.

By way of example, the Armauflageteil 9 according to the representations of FIGS. 1 and 3 in a lower Armauflageposition 12 and as shown in the FIG. 2 shown in an upper Armauflageposition 13.

The lever mechanism 10 consists in this embodiment of a base member 14 which is fixedly fixed to a frame 15 of the vehicle seat 1.

Furthermore, the lever mechanism 10 comprises a relative to this frame 15 height-adjustable sub-component 16 for supporting or supporting the Armauflageteils. 9

Between the stationary base part 14 and the height-adjustable lower component 16, a first pivot lever part 17 and a second pivot lever part 18 are mounted so that the height-adjustable lower component 16 always remains almost horizontal when moving in the vertical direction 11, so that the Armauflageteil 9 always correspondingly horizontal is aligned to ensure a high level of comfort for a user sitting on the vehicle seat 1 passenger (not shown here).

The swivel lever parts 17 and 18 are mounted by means of bearings 19 and 20 hinged to the stationary base member 14. Accordingly, the two pivot lever parts 17 and 18 by means of further bearings 21 and 22 on the height-adjustable base member 16th hinged. These bearings 19, 20, 21 and 22 each form a not separately quantified here pivot point on the lever mechanism 10.

In order to lock the lever mechanism 10 with respect to an unwanted height adjustment in the vertical direction 11, the height-adjustable armrest 8 still comprises a locking device 30 (see also FIGS. 7 and 8 ).

A first possible mechanism 31 of this locking device 30 is explicitly according to the illustrations of FIGS. 7 and 8 The locking device 30 comprises a first blocking part 32 and a second blocking part 33. The two locking parts 32 and 33 are rotatably mounted to each other about a common axis of rotation 34, wherein the first locking part 32 is fixed by means of a screw connection, not shown here on the first pivot lever part 17. Accordingly, the second locking part 33 is fixed by means of a likewise not shown screw on the height-adjustable sub-component 16.

Thus, the first blocking part 32 is substantially base-component side and the second blocking part 33 is mounted on the lower side within the lever mechanism 10.

In any case, the locking device 30 is placed in this embodiment between the height-adjustable lower component 16 and the first pivot lever part 17.

The first blocking part 32 comprises a first blocking toothing 35, which is directed onto the axis of rotation 34 and extends in an arc shape at least partially around this axis of rotation 34.

Accordingly, the second blocking part 33 comprises a second blocking toothing 36, which lies opposite the first blocking toothing 35. The second locking toothing 36 is also directed to the axis of rotation 34 and extends arcuately at least partially about the axis of rotation 34th

Between the two locking parts 32 and 33 is an intermediate part 37 for supporting locking means 38 (see FIG. 8 ) arranged. The intermediate part 37 comprises two guide grooves 39 and 40, wherein the first guide groove 39 of the first ratchet teeth 35 and the second guide groove 40 of the second ratchet teeth 36 opposite.

The blocking means 38 comprise in this embodiment two locking slide parts 41 and 42 (shown here only by way of example), wherein the first locking slide part 41 in the radial direction 43 is slidably mounted in the first guide groove 39 radially to the rotational axis 34, and wherein the second locking slide member 42 is mounted radially displaceable in the radial direction 43 in the second guide groove 40 to the rotational axis 34 accordingly.

The locking means 38 and thus also the two locking slide parts 41 and 42 each have a counter-locking teeth 44 and 45, which can be brought into engagement with the respective locking teeth 35 and 36, when the locking slide parts 41 and 42 are pushed radially outward.

Thus, the locking slide parts 41 and 42 can be pushed radially outwardly constructively simple, so that the counter locking teeth 44 and 45 can be engaged in the respective locking teeth 35 and 36, and thereby the two locking members 32 and 33 are locked against rotation, comprises the locking device 30 is still an actuating element 46 in the form of a fixed to the axis of rotation 34 cam member 47th

The cam member 47 forms two cams 48 and 49, each with a curved path 50 (only exemplified, see FIG. 8 ) of the respective locking slide part 41 or 42 corresponds.

If the actuating element 46 or the cam part 47 is now rotated in a first direction of rotation 51, the cams 48 and 49 come into operative contact with the respective cam track 50 of the locking slide part 41 or 42 in such a way that the locking slide parts 41 and 42 pass through the cams 48 and 49 are each pressed radially outward.

As a result, the locking device 30 locks the lever mechanism 10 in total, so that a height adjustment of the height-adjustable Armauflageteils 9 is not possible and the armrest 8 is fully loaded from above by bearing forces.

A permanent or automatic blocking of the lever mechanism 10 can be achieved structurally simple and reliable, that the rotation axis 34 and the cam member 47 is spring biased in this first direction of rotation 51, so that the anti-lock teeth 44 and 45 always automatically in the respective corresponding locking teeth 35 and 36 are engaged. Thus, the height-adjustable armrest 8 is locked in the normal state or in the use state of the vehicle seat 1.

If now a height adjustment to the height-adjustable armrest 8 are made, the counter-locking teeth must be 44 and 45 disengaged from the respective locking teeth 35 and 36 respectively. This succeeds structurally very simple by integrally formed on the cam member 47 disengagement elements 52 and 53. These disengagement elements 52 and 53 are formed radially further outward than the cams 48 and 49 on the circumference of the cam member 47 and also offset in the circumferential direction. The disengaging elements 52 and 53 can in this case correspond with correspondingly shaped material recesses 54 or 55 of the locking slide parts 41 and 42, respectively, when the rotation axis 34 and thus also the cam part 47 are rotated in a second direction of rotation 56, which is opposite to the first direction of rotation 51 ,

The disengaging elements 52, 53 in this case design contact surfaces 57 and 58, respectively, which, when the actuating element 46 rotates in the second direction of rotation 56, have correspondingly shaped run-on slopes 59 (only exemplified here, see FIG FIG. 8 ) of the radially displaceable locking slide parts 41 and 42 interact.

Here, the release elements 52 and 53 engage in a particularly space-saving manner in the material recesses 54 and 55, respectively.

In this respect, upon rotation of the cam member 47 in the second direction of rotation 56, the two cams 48 and 49 away from the respective cam track 50 of the locking slide 41 and 42, at the same time or slightly offset, the contact surfaces 57 and 58 of the release elements 52 with the respective the corresponding locking slide member 41 and 42 formed run-on slope 59 so comes into contact, that the locking slide parts 41 and 42 moved radially inward, that is to the axis of rotation 34 to be moved.

Laterally above the counter-locking teeth 44 and 45, axial guide surfaces 60 are still formed, by means of which improved guidance of the locking slide parts 41 and 42 in the guide grooves 39 and 40 can be ensured.

For a simple rotation of the rotation axis 34 is at the outwardly projecting end 61 of the rotation axis 34, a rotary handle 62 (see FIGS. 3, 4 and 5 ), which can be well packed by hand and rotated in the first direction of rotation 51 or in the second direction of rotation 56.

In addition, the height-adjustable armrest 8 expediently still has a drive device 65 (see FIG. 6 ), by means of which a height adjustment to the armrest 8 can be made easier.

In this embodiment, the drive device 65 comprises a tension spring element 66, which in particular according to the illustration of FIG. 5 in connection with the locking device 30 is shown.

This Zugfederelement 66 is hooked on the one hand to a pin 67 of the base member 14 and on the other hand in a suitable manner on the axis of rotation 34 such that the height-adjustable sub-component 16 is always lifted slightly unlocked locking device 30 upwards. As a result, a more comfortable adjustment of the height-adjustable armrest 8 is achieved.

An even more comfortable setting can be achieved if the drive device 65 is alternatively equipped with an electric drive motor 68, as shown in FIG FIG. 6 is shown.

It is understood that the exemplary embodiment explained above is only a first embodiment of the vehicle seat according to the invention. In this respect, the embodiment of the invention is not limited to this embodiment.

All disclosed in the application documents features are claimed as essential to the invention, provided they are new individually or in combination over the prior art.

LIST OF REFERENCE NUMBERS

1

vehicle seat

2

Nutzkraftfahrzeugsitz

3

agricultural utility vehicle

4

seat part

5

backrest

6

right side

7

Main direction of travel

8th

height-adjustable armrest

9

Armauflageteil

10

lever mechanism

11

vertical direction

12

lower armrest position

13

upper armrest position

14

basic component

15

frame

16

height-adjustable substructure

17

first pivot lever part

18

second pivot lever part

19

first depository

20

second depository

21

third depository

22

fourth depository

30

locking device

31

first possible mechanics

32

first blocking part

33

second blocking part 33

34

axis of rotation

35

first locking toothing

36

second locking toothing

37

intermediate part

38

blocking means

39

first guide groove

40

second guide groove

41

first Sperrschiebeteil

42

second Sperrschiebeteil

43

radial direction

44

first counter-toothing

45

second counter-toothing

46

actuator

47

cam member

48

first cam

49

second cam

50

cam track

51

first direction of rotation

52

first release element

53

second release element

54

first material recess

55

second material recess

56

second direction of rotation

57

first contact surface

58

second contact surface

59

bevels

60

Axialführungsflächen

61

The End

62

rotary handle

65

driving means

66

tension spring

67

bolt

68

drive motor

Claims (11)

Vehicle seat (1, 2) with a seat part (4), with a backrest (5) and with a height-adjustable armrest (8), wherein the height-adjustable armrest (8) an Armauflageteil (9) and a lever mechanism (10) for lifting or Lowering the Armauflageteils (9) with a stationary base member (14), with one or two hinged to the base member (14) pivot lever parts (17, 18) and with a hinged to the or on the pivot lever parts (17, 18) height-adjustable sub-component (16 ) for supporting the armrest part (9),
marked by
a locking device (30) for locking the lever mechanism (10) with a base component side arranged and a first locking teeth (35) having first locking member (32), arranged with a lower side and a further locking teeth (36) having second locking member (33), and with Locking means (38) which are so displaceable relative to the two locking parts (32, 33) by means of an actuating element (46) that Gegensperrverzahnungen (44, 45) of the locking means (38) in the locking teeth (35, 36) of the locking parts (32 , 33) are engageable or disengageable to lock or unlock the lever mechanism (10). Vehicle seat (1, 2) according to claim 1,
characterized in that
the actuating element (46) comprises a cam part (47) rotatable with an axis of rotation (34) and locking means (38) radially outwardly of said axis of rotation (34) and capable of displaceable locking sliding parts (41, 42) comprising the counter locking teeth (44, 45) the radially displaceable locking slide parts (41, 42) and cam areas (48, 49) of the rotatable cam part (47) are arranged relative to one another such that upon rotation of the actuating element (46) in a first direction of rotation (51) the counter locking teeth (44, 45) the radially displaceable locking slide parts (41, 42) can be brought into engagement with the locking toothings (35, 36) by the rotatable cam part (47). Vehicle seat (1, 2) according to claim 2,
characterized in that
the cam part (47) comprises disengaging elements (52, 53) which are in operative connection with the radially displaceable locking slide parts (41, 42) in such a way that upon rotation of the actuating element (46) in a direction of rotation (51) opposite the second direction of rotation (FIG. 56), the counter-locking teeth (44, 45) of the radially displaceable locking slide parts (41, 42) can be disengaged from the locking teeth (35, 36) by the rotatable cam part (47). Vehicle seat (1, 2) according to claim 3,
characterized in that
the disengagement elements (52, 53) have contact surfaces (57, 58) which interact with run-on slopes (59) of the radially displaceable locking slide parts (41, 42) when the actuating element (46) rotates in the second direction of rotation (56). Vehicle seat (1, 2) according to claim 3 or 4,
characterized in that
the release elements (52, 53) are disposed radially further outward than the cam portions (48, 49) and circumferentially of the rotatable cam member (47) offset from the cam portions (48, 49). Vehicle seat (1, 2) according to one of claims 2 to 5,
characterized in that
the outwardly displaceable locking slide parts (41, 42) are arranged spring biased such that the counter locking teeth (44, 45) with the locking teeth (35, 36) are always kept in engagement. Vehicle seat (1, 2) according to one of claims 1 to 6,
characterized in that
the locking device (30) is arranged interactively between the height-adjustable lower component (16) and one of the swivel lever parts (17, 18) or between the base component (14) and one of the swivel lever parts (17, 18). Vehicle seat (1, 2) according to one of claims 1 to 7,
marked by
a drive device (65) with a drive element for power-assisted height adjustment of the armrest part (9). Vehicle seat (1, 2) according to claim 8,
characterized in that
the drive element comprises a tension spring element (66). Vehicle seat (1, 2) according to claim 8 or 9,
characterized in that
the drive element comprises an electrically driven drive motor (68). Utility vehicle, in particular agricultural utility vehicle (3), with at least one vehicle seat (1, 2),
marked by
a vehicle seat (1, 2) according to one of the preceding claims.

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